vold.fstab edit for my phone

hello everyone.. !!
my device name is celkon A8+
i am pasting my vold.fstab text here , please any one edit it to swap my internal and external memories
thank you in advance !!
:)


#######################
## Regular device mount
##
## Format: dev_mount <label> <mount_point> <part> <sysfs_path1...>
## label - Label for the volume
## mount_point - Where the volume will be mounted
## part - Partition # (1 based), or 'auto' for first usable partition.
## <sysfs_path> - List of sysfs paths to source devices
######################

# Mounts the first usable partition of the specified device
#dev_mount sdcard /mnt/sdcard auto /block/mmcblk0
dev_mount sdcard /mnt/sdcard auto /devices/platform/sprd-sdhci.0/mmc_host/mmc0